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Dye Penetrant Examination (D.P.E) |
 The
test object is coated with a solution that contains a visible or fluorescent
dye. Excess solution is then removed from the surface of the object
but leaving it in surface breaking defects. A developer is then applied
to draw the penetrant out of the defects. With fluorescent dyes, ultraviolet
light is used to make the bleed out fluoresce brightly, thus allowing
imperfections to be readily seen . With visible dyes, vivid color
contrasts between the penetrant and developer make "bleed out"
easy to see. The red indications below represent a number of defects
in this component.
We are carrying out visual-color contrast/fluorescent Dye penetratant
examination for various clients like Mitsubushi, L&T, UB, ONGC
& NPC etc. we have carried out DPE for calandria end shield and
coolant channel for L&T, Powai at TAPP-III/IV under the inspection
of NPC. We are carrying out DPE at L&T Hazira works, since last
seven years. |
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